Conveyor chain pin forming facility

ABSTRACT

A conveyor chain pin forming facility includes a base, on which are installed a fixed bottom die device, a movable top die device and two movable side die devices. The side die devices are separately installed on two ends of the bottom die device. A metal object is placed inside the bottom die device. By closing the top die device and the side die devices onto the top side and two sides of the bottom die device, the metal object is compressed to form. The component thus formed has a smooth surface without protruded ribs, and the production process can be simplified.

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The present invention relates to a forming facility having a plurality of dies, each die moves in relation to each other to close or open, and form a conveyor chain pin.

(b) Description of the Prior Art

As shown in FIG. 1, the conventional conveyor chain consists of a carrier member 10, and a connector member 12 fitted at two ends of the carrier member 10. Wherein, on the surface of the carrier member 10 is a through hole 14 to accommodate a hanging hook (not shown). The carrier member 10 and the connector member 12 are joined by a pin 16. One end of the foregoing hook far away from the chain is used for hanging large or small meat or a bag containing a load.

As shown in FIG. 2, the pin 16 is a heated metal object that is compressed to form in a pressing device. The important point is that, when the top and bottom dies of the pressing device close to each other to cut the burr of formed pin 16, there will be protruded ribs 18 remaining on the surface of the pin 16.

As shown in FIG. 3, when the pin 16 is inserted between the carrier member 10 and the connector member 12, the protruded ribs 18 will continuously cause friction with the carrier member 10 and the connector member 12, resulting in wear and tear on the carrier member 10 and the connector member 12.

The pin 16 can be made by press forming and burr cutting, but because of the protruded ribs 18 on the surface of the pin 16, causing wear and tear on other components, the conventional pin 16 is not an ideal component.

SUMMARY OF THE INVENTION

In view of the shortcoming of the prior art that involves the risk of causing wear on other components, the present invention provide an innovated forming facility for the production of a pin without protruded ribs on its surface.

To achieve the foregoing objectives and performance, the present invention is installed a fixed bottom die device and a movable top die device and side die devices on a base. After a heated metal object is placed inside the bottom die device, the top die device and the side die devices close to the bottom die device, thereby compressing and forming the metal object into a desired pin configuration without protruded ribs on its surface.

A preferred embodiment of the present invention is described hereunder with drawings to illustrate the objectives, performance and configurations of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial exterior view of a conveyor chain.

FIG. 2 is an exterior view of a prior art of pin.

FIG. 3 is a schematic view of a prior art of chain.

FIG. 4 is a schematic view of the present invention.

FIG. 5 is an exterior view of the top die device and bottom die device in the present invention.

FIG. 6 is a first view of the invention in application.

FIG. 7 is a schematic view of the invention with the top die device and the bottom die device closing on the rear side.

FIG. 8 is a second view of the invention in application.

FIG. 9 is a third view of the invention in application.

FIG. 10 is an exterior view of the formed pin in the invention.

BRIEF DESCRIPTION OF THE NUMERALS

10 carrier member 12 connector member 14 through hole 16 pin 18 rib 30 base 40 bottom die device 42 bottom die hole 44 opening 50 top die device 52 top die hole 54 opening 60 side die device 62 protrusion 70 metal object

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

As shown in FIG. 4, the present invention of forming facility comprises a base 30, a bottom die device 40, a top die device 50 and two side die devices 60; wherein the base 30 serves to accommodate the installation and assembly of said components.

As shown in FIGS. 4 and 5, the bottom die device 40 is fixed on the base 30. On the surface of the bottom die device 40 is a bottom die hole 42. The shape of the bottom die hole 42 is equivalent to the shape of the pin. Each of two ends of the bottom die device 40 has an opening 44.

As shown in FIG. 4, the top die device 50 is assembled to the base 30, and, driven by a driving device, such as a hydraulic cylinder pushing the top die device 50, the top die device 50 is moved toward or away from the bottom die device 40.

As shown in FIG. 5, the top die device 50 has a top die hole 52 on a surface thereon. The shape of top die hole 52 is equivalent to the bottom die hole 42, and forming an opening 54 at each of two ends thereof.

As shown in FIG. 4, two side die devices 60 are assembled to the base 30, located at two ends of the bottom die device 40. Two side die devices 60 are optionally moved by an appropriate driving device toward or away from the bottom die device 40. The side die device 60 has a protrusion 62.

As shown in FIG. 6, the pin is made by placing a heated metal object 70 inside the bottom die device 40, the top die device 50 moves down to close on the bottom die device 40. As shown in FIG. 7, when the top die device 50 is closed to the bottom die device 40, the openings 44, 54 are opposite each other.

As shown in FIG. 8, the side die devices 60 located at two ends of the bottom die device 40 moves toward the bottom die device 40, the protrusions 62 of the side die devices 60 enter into the die device through the openings 44, 54 at the sides of the top die device 50 and the bottom die device 40 to compress the metal object 70.

The metal object 70 is then compressed and deformed by the side die devices 60 to fill up the die holes 42, 52 of the top die device 50 and the bottom die device 40, thereby the forming process is completed.

As shown in FIG. 9, after the metal object 70 is formed into a pin, the top die device 50 and the side die devices 60 move away from the bottom die device 40, then the operator can take out the formed pin.

Because of the compression method adopted in the foregoing forming facility involves compressing the heated metal object 70, there is no protruded ribs on the surface of the formed pin, as shown in FIG. 10. Therefore, there will be no wear between the members when the pin is assembled into the conveyor chain.

Alternatively, the metal object 70 without being heated beforehand is compressed to form by the facility disclosed in the present invention, thereby enabling simplified production. Moreover, the facility disclosed herein can be used to make other components than the conveyor chains, such as the carrier member and the connector member.

It is to be understood that the foregoing description relating to the preferred embodiment and design drawings of the present invention shall not be based to restrict the claim of the invention, and that all equivalent art deriving from the foregoing should be included in the following claim. 

1. A conveyor chain pin forming facility, comprising: a base; a bottom die device fixed to the base having a bottom die hole at a specified location thereof; a top die device movably installed onto the base having a top die hole at a specified location thereof, so that the top die device is corresponding to the bottom die device; two side die devices separately and movably installed on the base; wherein the die hole of the bottom die device serving to accommodate a metal object, the top die device moving toward the bottom die device until the top and bottom die holes are opposite each other, the two side die devices moving toward the top die device and the bottom die device, thereby a heated metal object is compressed to become a desired form by the closing movement of the top die device and the side die devices toward the bottom die device.
 2. The conveyor chain pin forming facility of claim 1, wherein when the top die device and the bottom die device are closed, there are openings on two ends thereof, and the side die devices have protrusions that extend into the openings. 